Added functions for matrix wrapping.

Documentation/Examples/Matrices/DenseMatrix/CMakeLists.txt

...ples/Matrices/DenseMatrix/DenseMatrixViewExample_wrap.cpp

...mples/Matrices/DenseMatrix/DenseMatrixViewExample_wrap.cu

Documentation/Examples/Matrices/SparseMatrix/CMakeLists.txt

...Matrices/SparseMatrix/SparseMatrixViewExample_wrapCSR.cpp

.../Matrices/SparseMatrix/SparseMatrixViewExample_wrapCSR.cu

...ices/SparseMatrix/SparseMatrixViewExample_wrapEllpack.cpp

...rices/SparseMatrix/SparseMatrixViewExample_wrapEllpack.cu

Documentation/Tutorials/Matrices/tutorial_Matrices.md

src/TNL/Matrices/MatrixWrapping.h

src/UnitTests/Matrices/CMakeLists.txt

src/UnitTests/Matrices/MatrixWrappingTest.cpp

src/UnitTests/Matrices/MatrixWrappingTest.cu

src/UnitTests/Matrices/MatrixWrappingTest.h